UL 1726 PDF

1 Scope

1.1 These requirements cover automatic drain valves that are intended to drain water from cavities in standpipe systems intended usually to be empty, such as those between a hose valve and hose rack, and pipe sections between fire department connections and check valves.

1.2 The valves covered by these requirements are intended for installation and use in accordance with the Standard for the Installation of Sprinkler Systems, NFPA 13, and the Standard for the Installation of Standpipe, Private Hydrant, and Hose Systems, NFPA 14, and the Standard for the Installation of Private Fire Service Mains and Their Appurtenances, NFPA 24.

Summary of Topics

This new Fourth Edition of UL 1726 dated December 3, 2024 includes the following changes:

– Add 300 series stainless steel to list of corrosion resistant materials, 5.1;

– Add new Metallic Materials section, Section 6;

– Update wording of the Leakage Test, 11.1 and 11.2;

– Change hydrostatic pressure requirement to four times rated working pressure, 12.1 and 12.2;

– Add new section Installation Instructions; and

– Editorial revisions and formatting updates throughout this Standard.